Question

i need the answer to number 15. the tables below do not have to do with the question. the question ends above where it says unit 4 lesson 15.

Answer 1

multiple choice: 17 questions

essays: 9 questions

Explanation:

Given that there are two variables and two sets of data in this problem, we can set up a system of equations to solve:

26 questions of multiple choice and essay:

x + y = 26, where 'x' = number of multiple choice, 'y' = number of essay

multiple choice worth 3 points, essay worth 8 points for a total of 123 points:

3x + 8y = 123

multiply the first equation by a factor of '-3' to eliminate the 'x' variable:

-3(x+ y = 26) = -3x -3y = -78

+ 3x + 8y = 123

5y = 45

y = 9

x + 9 = 26

x = 17

9 essay, 17 multiple choice